Thermodynamic cycle system and method for ammonia water mixed working medium power cooling combined supply

Abstract

The invention discloses a thermodynamic cycle system and method for ammonia water mixed working medium power cooling combined supply. Ammonia water mixture serves as a working medium, and medium-and-low temperature heat serves as a heat source; the thermodynamic cycle system includes a power cycle and a refrigerating cycle; and the power cycle taking the ammonia water mixture as the working medium, the characteristic of temperature-variable evaporation of the working medium is utilized to be excellently matched with a sensible heat source, meanwhile, the temperature-variable condensation of the working medium is utilized to provide heat for the re-boiling process of a tower kettle and the preheating process for partial feeding material of a rectifying tower of the refrigerating cycle. Through the system integration, the high-temperature part of the external heat source is utilized for power cycle, the low-temperature part of the external heat source and the heat extraction of the power cycle are utilized for the refrigerating cycle, the matched temperature and stepped utilization of heat are realized, and compared with the typical dividing system, the performance of the system is improved.

Description

technical field [0001] The invention relates to the field of energy technology, in particular to a thermodynamic cycle system and method for a mixed working fluid combined power and cooling supply using ammonia-water mixture as a working fluid. Background technique [0002] my country's industrial energy consumption accounts for about two-thirds of the country's total energy consumption, but energy utilization efficiency is low, and more than 50% of it is discharged in the form of medium and low temperature heat, which not only causes energy waste, but also causes thermal pollution to the environment. Recycling these waste heat plays a significant role in improving my country's energy utilization efficiency. The ammonia water absorption refrigeration cycle, the ammonia water power cycle, and the combined power and cooling cycle system combining the ammonia water absorption refrigeration and power cycle are typical thermodynamic cycle systems that can utilize low-temperature ...

AI Technical Summary

Problems solved by technology

[0015] In order to overcome the shortcomings of the existing medium and low temperature waste heat utilization methods, the present invention proposes a thermodynamic cycle system and method for combined power and cold supply of ammonia water mixed working medium to solve the problem of large heat transfer temperature difference of the rectification tower reboiler in the refrigeration cycle, single In the working fluid power generation cycle, the heat transfer temperature difference is large during the evaporation process of the working fluid, and the heat transfer temperature difference caused by the variable temperature condensation of the exhaust steam of the mixed working fluid power generation cycle turbine is large.

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